Portland/ Weather & Environment

Damp Wake-Up, Sunny Break: Portland Braces for Brief Warmup Before Midweek Soaker

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Published on August 29, 2026
Damp Wake-Up, Sunny Break: Portland Braces for Brief Warmup Before Midweek SoakerSource: Wikipedia/Paul Downey from Berkhamsted, UK, CC BY 2.0, via Wikimedia Commons

Portland woke to light rain and temperatures around 57 degrees Saturday morning, but the damp start should give way to a partly sunny afternoon. The high is expected to reach about 72 degrees before a much warmer stretch arrives Sunday and Monday. Then the forecast takes a distinctly wetter turn.

According to the National Weather Service Portland, rain is most likely before 2 p.m. Saturday, with only light amounts expected around the Portland metro area. West-southwest winds should stay modest at 3 to 7 mph, making this more of an umbrella-and-coffee morning than a full washout.

Fog Could Bookend a Mild Sunday

Saturday night will turn partly cloudy, with patchy fog possible between 1 and 5 a.m. Sunday. Sunday morning may start foggy again before skies brighten, and the afternoon should be partly sunny with a high near 73 degrees.

Sunday night looks mostly clear, with temperatures dipping to about 54 degrees. Winds will remain light, generally below 10 mph, so outdoor plans should get a relatively comfortable window after the morning haze lifts.

Monday Brings the Brief Warmup

Monday is expected to be the warmest day of the near-term forecast, with mostly sunny skies and a high near 81 degrees. The overnight low should settle around 58, offering one last easy summer-style evening before the pattern changes.

Rain Returns Tuesday and Strengthens Wednesday

A chance of rain returns Tuesday after 11 a.m., with mostly cloudy skies and a high near 75 degrees. Rain chances increase Tuesday night, and Wednesday currently looks like the wettest day in Portland, with an 85% chance of rain and a high near 65.

The National Weather Service says the middle-of-week system could bring a more substantial, widespread soaking, although the exact timing and rainfall totals remain uncertain. For commuters and anyone planning outdoor work, Wednesday is the day most likely to require a real rain jacket rather than a hopeful forecast check.

Showers May Linger Through Friday

Rain is likely again Thursday, with a high near 67 degrees and a 66% chance of precipitation. Friday should be a little warmer at around 71 degrees, but a lingering 30% chance of light rain means the week may end on a damp note.

No watches, warnings or advisories are listed for Oregon or southwest Washington in the current forecast. In short, Portland gets a mild Saturday-to-Monday run, followed by a cooler and wetter stretch from Tuesday through Friday.